1、A1.粗牙系列(见表 1)表 1 单位为毫米小径公差值 小径公差值公称直径 螺距螺纹底孔公差等级 上偏差 下偏差公称直径 螺距螺纹底孔公差等级 上偏差 下偏差1.0 0.25 0.755H+0.03504.5 0.75 3.75H6H7H+0.138+0.178+0.2240001.1 0.25 0.855H+0.03505.0 0.80 4.205H6H7H+0.094+0.134+0.1840001.2 0.25 0.955H+0.03506.0 1.00 5.005H6H7H+0.107+0.153+0.2170001.4 0.30 1.105H6H+0.042+0.060007.0 1
2、.00 6.005H6H7H+0.107+0.153+0.2170001.6 0.35 1.255H6H+0.051+0.070008.0 1.25 6.805H6H7H+0.059+0.112+0.1820001.8 0.35 1.455H6H+0.051+0.070009.0 1.25 7.805H6H7H+0.059+0.112+0.1820002.0 0.40 1.605H6H+0.057+0.0790010.0 1.50 8.55H6H7H+0.112+0.176+0.2510002.2 0.45 1.755H6H+0.063+0.0880011.0 1.50 9.55H6H7H+0
3、.112+0.176+0.2510002.5 0.45 2.055H6H+0.063+0.0880012.0 1.75 10.25H6H7H+0.171+0.241+0.3310003.0 0.50 2.505H6H7H+0.071+0.099+0.13900014.0 2.00 12.005H6H7H+0.135+0.210+0.3100003.5 0.60 2.905H6H7H+0.075+0.110+0.15000016.0 2.00 14.005H6H7H+0.135+0.210+0.3100004.0 0.70 3.305H6H7H+0.082+0.122+0.16600018.0
4、2.50 15.505H6H7H+0.149+0.244+0.354000表 1(续) 单位为毫米小径公差值 小径公差值公称直径 螺距螺纹底孔公差等级 上偏差 下偏差公称直径 螺距螺纹底孔公差等级 上偏差 下偏差20.0 2.50 17.505H6H7H+0.149+0.244+0.35400039.0 4.00 35.005H6H7H+0.145+0.270+0.42000022.0 2.50 19.505H6H7H+0.149+0.244+0.35400042.0 4.50 37.505H6H7H+0.159+0.279+0.47900024.0 3.00 21.005H6H7H+0.15
5、2+0.252+0.38200045.0 4.50 40.505H6H7H+0.159+0.279+0.47900027.0 3.00 24.005H6H7H+0.152+0.252+0.38200048.0 5.00 43.005H6H7H+0.147+0.297+0.48700030.0 3.50 26.505H6H7H+0.161+0.271+0.42100052.0 5.00 47.005H6H7H+0.147+0.297+0.48700033.0 3.50 29.505H6H7H+0.161+0.271+0.42100056.0 5.50 50.505H6H7H+0.146+0.296+0.49600036.0 4.00 32.005H6H7H+0.145+0.270+0.420000
